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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb498aa24e5940ccc1ab2a2146edfe697eca08c46adbfa2f7b473f3570e308ca' 
  AND token = 'E3Oo6yeIQO5pXerYiGPjP46RHeWxcqbObPRWI/VWM0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}